The wavelength is the distance between repeating units of a wave pattern. It is commonly designated by the Greek letter lambda (?).In a sine wave, the wavelength is the distance between peaks:
The x axis represents distance, and I would be the strength of the electric or magnetic field component, at a given point in time, as a function of x. Wavelength ? has an inverse relationship to frequency f, the number of peaks to pass a point in a given time. The wavelength is equal to the speed of the wave divided by the frequency of the wave.
l = wavelength of an electromagnetic wave or
c = speed of light in vacuum = 299,792,458 m/sec = 983,569,089 ft/sec
For radio waves this relationship becomes: